CVE-2026-3418
Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
- Published
- Updated
- Reserved
- Assigned by
- WSO2
Description
The System REST API accepts user-supplied file uploads without enforcing sufficient validation on the file type or destination, allowing files to be written to arbitrary server-accessible locations. Exploitation requires authenticated administrative access with publisher privileges. Successful exploitation permits an authenticated publisher to upload files to server-accessible locations. Depending on the deployment environment and how uploaded files are handled, this could lead to the execution of uploaded content, potentially resulting in remote code execution.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WSO2CNA (assigner) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.76% · top 45% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Weakness
Affected products
- affected 4.4.0 – < 4.4.0.67
- affected 4.5.0 – < 4.5.0.52
- affected 4.6.0 – < 4.6.0.16
- affected 4.5.0 – < 4.5.0.51
- affected 4.6.0 – < 4.6.0.16
- affected 4.5.0 – < 4.5.0.53
- affected 4.6.0 – < 4.6.0.17
- affected 4.5.0 – < 4.5.0.52
- affected 4.6.0 – < 4.6.0.16
WSO2 · WSO2 Carbon API Management Implementation
- affected 9.30.67 – < 9.30.67.156
- affected 9.31.86 – < 9.31.86.141
- affected 9.32.147 – < 9.32.147.44
- unaffected 9.33.104 – ≤ *
WSO2 · WSO2 API Manager Publisher REST API V4
- affected 9.30.67 – < 9.30.67.156
- affected 9.31.86 – < 9.31.86.141
- affected 9.32.147 – < 9.32.147.44
- unaffected 9.33.104 – ≤ *
WSO2 · WSO2 Carbon API Management API
- affected 9.30.67 – < 9.30.67.156
- unaffected 9.33.104 – ≤ *
What to do
Solution: Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/#solution https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/#solution
References (1)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-3418)Record last updated .